Wyoming Hazardous Waste Storage regulations & environmental compliance analysis

Wyoming Hazardous Waste Storage: What you need to know

Governing Law and Regulations

Hazardous waste storage facility rules: The Wyoming Hazardous Waste Rules & Regulations (HWRR) Chapter 1, Section 264 and HWRR Chapter 1, Section 265(interim status)

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On-site storage rules for hazardous waste generators: HWRR Chapter 1, Section Section 262 SQG notification requirement: HWRR Chapter 1, Section 262(a)(v)

Regulatory Agency

Wyoming Department of Environmental Quality (DEQ) Solid and Hazardous Waste Division

Comparison: State vs. Federal

· Rules. Wyoming incorporates by reference the federal hazardous waste storage rules for permitted and interim-status treatment, storage, and disposal facilities (TSDFs). In addition, the state follows the federal requirements for generators accumulating hazardous waste on-site without a permit through its incorporation by reference of the U.S. Environmental Protection Agency's (EPA) Hazardous Waste Generator Improvements Rule, effective in Wyoming as of May 3, 2019. The state adds a notification requirement for hazardous waste small quantity generators (SQGs).

· Administration and enforcement. The Wyoming Department of Environmental Quality’s (DEQ) Solid and Hazardous Waste Division administers and enforces the hazardous waste storage regulations in Wyoming..

State Requirements


HWRR Chapter 1, Section 262(a)(v)

The federal rules require SQGs to immediately notify the National Response Center (using their 24-hour toll free number 800/424-8802) in the event of a fire, explosion, or other release which could threaten human health outside the facility, or when the generator has knowledge that a spill has reached surface water. In addition, Wyoming requires an SQG’s emergency coordinator to immediately notify DEQ at ...

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